Cpu 928B; Technical Description; Application; Design - Siemens S5-155U System Manual

5.2

CPU 928B

5.2.1

Technical Description

Application

Design

System Manual
C79000-B8576-C199-03
This section contains the hardware description and technical
specifications of the CPU 928B.
Details on programming the CPU 928B can be found in the
CPU 928B Programming Guide.
You can use the CPU 928B in single and multiprocessor operation in
the S5-135U/155U central controller (see Chapter 6). Up to four CPUs
can be used.
The CPU 928B is universally applicable, ensuring both very fast bit
processing and very fast word processing.
The following program processing levels are possible:
• • Cyclic
• • Time-controlled (9 different timebases)
• • Real-time controlled
• • Interrupt-driven (hardware interrupt)
• • Delayed (from Version 6ES5 928-3UB12)
The programming language is STEP 5.
The electronic circuitry of the CPU 928B is on two PCBs (basic and
expansion boards) in the double Eurocard format. Both PCBs are
screwed together, linked via connectors, and must not be separated.
The basic board provides the connection to the S5 bus via two
backplane connectors.
The front plate width is 2 2/3 standard plug-in stations.

CPU 928B

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